[j-nsp] redundant power AC+DC allowed?
Vincent J. Bono
vbono at bostondatacenters.com
Mon Jan 9 08:48:17 EST 2006
Normally you can't do this due to the differing size of grounding wires in
AC and DC configurtions. The DC ground cables need to be much larger than
the AC ones and for a product to be UL listed any connection to ground has
to be able to carry 100% of the possible fault current at any operating
voltage.
That does not mean it wont work, just that its not designed to do so and the
M7 is small enough that it might not be a real issue. That being I've
looked and found nothing saying you can't in the docs however nothing says
you can and I personally would not.
----- Original Message -----
From: "Reino Piip" <reino.piip at ericsson.com>
To: <juniper-nsp at puck.nether.net>
Sent: Monday, January 09, 2006 6:23 AM
Subject: [j-nsp] redundant power AC+DC allowed?
> Hi
>
> I didn't find any ok-or-not statements in the technical documentation.
> Has anyone seen an official statement or can otherwise say why or why
> not to use this kind of configuration (1 AC and 1 DC power supply in one
> chassis) for example in M7i?
>
> wbr,
> Reino
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